There are many tally counter apps on the App Store, but Auto Tally Counter is the only one that offers an Auto-Count feature. Just hold down the + button, or the auto slow hold / auto fast hold button to increment automatically at one of three different speeds. Ideal for long counting jobs where things youre counting are evenly spaced and very repetitive.
When youre done, tap the copy button to copy the result to the clipboard and paste to whatever destination you need.
Happy counting!